Can someone post a pic of the bend in the clutch line? I am at that stage and it looks like the lower clamp of the tree will hit/compress the rubber hose in a full lock left turn. A pic would be of enormous help.
I don't have a picture for you but I did the switch last year. Best mod I've done. Much more comfortable. I had the work done by a mechanic. The original lines will work with the change but we could see that there was tension on the brake line when the handlebars were in the parked position and swung to the left. He said over time this would stress the connection point on the lever, so I had him put on a longer brake line. One and a half inches worked perfectly.
I just did mine a couple of weeks ago. Here are two pics. I actually installed Fatboy handlebars, but they are very similar to the Retro bars. I am very happy with the setup. The bend is just enough that the line doesn't kink at full left. I could have probably went a little further with the bend, but I didn't want to take a chance of messing up.